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Intel® Desktop Board D945PSN
Product Guide
Order Number: D10461-003
Revision History
Revision Revision History Date
-001
First release of the Intel
®
Desktop Board D945PSN Product Guide.
April 2005
-002
Second release of the Intel
®
Desktop Board D945PSN Product Guide.
August 2005
-003
Third release of the Intel
®
Desktop Board D945PSN Product Guide.
April 2006
If an FCC declaration of conformity marking is present on the board, the following statement applies:
FCC Declaration of Conformity
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.
For questions related to the EMC performance of this product, contact:
Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124
1-800-628-8686
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to an outlet on a circuit other than the one to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to
operate the equipment.
Tested to comply with FCC standards for home or office use.
Canadian Department of Communications Compliance Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the
Radio Interference Regulations of the Canadian Department of Communications.
Le présent appareil numerique német pas de bruits radioélectriques dépassant les limites applicables aux appareils
numériques de la classe B prescrites dans le Réglement sur le broullage radioélectrique édicté par le ministére des
Communications du Canada.
Disclaimer
Information in this document is provided in connection with Intel
®
products. No license, express or implied, by estoppel or
otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel’s Terms and Conditions
of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating
to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability,
or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical,
life saving, or life sustaining applications. Intel may make changes to specifications and product descriptions at any time,
without notice.
Desktop Board D945PSN may contain design defects or errors known as errata which may cause the product to deviate
from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product
order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from Intel Corporation by going to the World Wide Web site at: http://www.intel.com/ or by calling
1-800-548-4725.
Intel, Pentium, and Celeron are registered trademarks of Intel Corporation or its subsidiaries in the United States and other
countries.
* Other names and brands may be claimed as the property of others.
Copyright © 2005-2006, Intel Corporation. All rights reserved.
iii
Preface
This Product Guide gives information about board layout, component installation, BIOS update,
and regulatory requirements for Intel
®
Desktop Board D945PSN.
Intended Audience
The Product Guide is intended for technically qualified personnel. It is not intended for general
audiences.
Use Only for Intended Applications
All Intel desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in
personal computers (PC) for installation in homes, offices, schools, computer rooms, and similar
locations. The suitability of this product for other PC or embedded non-PC applications or other
environments, such as medical, industrial, alarm systems, test equipment, etc. may not be supported
without further evaluation by Intel.
Information Layout
The chapters in this Product Guide are arranged as follows:
1 Desktop Board Features: a summary of product features
2 Installing and Replacing Desktop Board Components: instructions on how to install the desktop
board and other hardware components
3 BIOS: instructions on how to update the BIOS
A Error Messages and Indicators: information about BIOS error messages and beep codes
B Regulatory Compliance: safety and EMC regulations, product certification
Conventions
The following conventions are used in this manual:
CAUTION
Cautions warn the user about how to prevent damage to hardware or loss of data.
NOTE
Notes call attention to important information.
Intel Desktop Board D945PSN Product Guide
iv
Terminology
The table below gives descriptions to some common terms used in the product guide.
Term Description
GB Gigabyte (1,073,741,824 bytes)
GHz Gigahertz (one billion hertz)
KB Kilobyte (1024 bytes)
MB Megabyte (1,048,576 bytes)
Mbit Megabit (1,048,576 bits)
MHz Megahertz (one million hertz)
Box Contents
Intel
®
Desktop Board D945PSN
I/O shield
One ATA-66/100 cable
Two locking Serial ATA cables
One diskette drive cable
Intel
®
Express Installer Driver CD-ROM
Intel Express Installer Software CD-ROM
Quick Reference poster
Configuration and battery caution statement label
v
Contents
1 Desktop Board Features
Supported Operating Systems ............................................................................................10
Desktop Board Components ...............................................................................................11
Processor............................................................................................................................13
Main Memory ......................................................................................................................14
Intel
®
945P Express Chipset ...............................................................................................15
Graphics Subsystem ...........................................................................................................15
Audio Subsystem ................................................................................................................15
Input/Output (I/O) Controller ................................................................................................16
LAN Subsystem ..................................................................................................................16
LAN Subsystem Software...........................................................................................16
RJ-45 LAN Connector LEDs.......................................................................................16
Hi-Speed USB 2.0 Support..................................................................................................17
Enhanced IDE Interface ......................................................................................................17
Serial ATA...........................................................................................................................17
Expandability.......................................................................................................................18
BIOS ...................................................................................................................................18
Serial ATA and IDE Auto Configuration ......................................................................18
PCI and PCI Express Auto Configuration ...................................................................18
Security Passwords....................................................................................................18
Chassis Intrusion.................................................................................................................19
Power Management Features .............................................................................................19
ACPI...........................................................................................................................19
Power Connectors......................................................................................................19
Fan Connectors..........................................................................................................19
Fan Speed Control (Intel
®
Precision Cooling Technology)..........................................19
Suspend to RAM (Instantly Available PC Technology) ...............................................20
Wake from USB..........................................................................................................21
Wake from PS/2 Keyboard/Mouse..............................................................................21
PME# Wakeup Support ..............................................................................................21
Speaker...............................................................................................................................21
Battery.................................................................................................................................21
Real-Time Clock..................................................................................................................21
2 Installing and Replacing Desktop Board Components
Before You Begin................................................................................................................23
Installation Precautions .......................................................................................................24
Installation Instructions........................................................................................................24
Ensure Electromagnetic Compatibility (EMC) Compliance..........................................24
Chassis and Component Certifications.......................................................................25
Prevent Power Supply Overload.................................................................................25
Place Battery Marking ................................................................................................25
Use Only for Intended Applications.............................................................................26
Installing the I/O Shield .......................................................................................................26
Intel Desktop Board D945PSN Product Guide
vi
Installing and Removing the Desktop Board........................................................................27
Installing and Removing a Processor ..................................................................................28
Installing a Processor .................................................................................................28
Installing the Processor Fan Heat Sink.......................................................................31
Connecting the Processor Fan Heat Sink Cable.........................................................31
Removing the Processor ............................................................................................31
Installing and Removing Memory ........................................................................................32
Installing DIMMs.........................................................................................................34
Removing DIMMs.......................................................................................................35
Installing and Removing a PCI Express x16 Card ...............................................................36
Installing a PCI Express x16 Card ..............................................................................36
Removing the PCI Express x16 Card .........................................................................36
Connecting the IDE Cable...................................................................................................37
Connecting the Serial ATA (SATA) Cable ...........................................................................38
Connecting Internal Headers...............................................................................................39
Installing a Front Panel Audio Solution for Intel
®
High Definition Audio.......................40
Connecting USB 2.0 Headers.....................................................................................41
Connecting IEEE 1394a Headers...............................................................................41
Connecting the Front Panel Header ...........................................................................41
Setting Up the Flexible 6- Channel Audio with Jack Re-tasking..........................................42
Connecting Fan and Power Cables .....................................................................................43
Connecting Fan Cables ..............................................................................................43
Connecting Power Supply Cables ..............................................................................44
Other Connectors................................................................................................................45
Setting the BIOS Configuration Jumper Block .....................................................................46
Clearing Passwords ............................................................................................................47
3 BIOS
Updating the BIOS with the Intel
®
Express BIOS Update Utility...........................................53
Updating the BIOS with the Iflash Memory Update Utility ....................................................54
Obtaining the BIOS Update File..................................................................................54
Updating the BIOS......................................................................................................54
Recovering the BIOS..................................................................................................55
A Error Messages and Indicators
BIOS Beep Codes...............................................................................................................57
BIOS Error Messages .........................................................................................................57
B Regulatory Compliance
Safety Regulations ..............................................................................................................59
European Union Declaration of Conformity Statement ........................................................59
Product Ecology Statements ...............................................................................................61
Lead-Free Desktop Board ..........................................................................................64
EMC Regulations ................................................................................................................65
Product Certification Markings (Board Level) ......................................................................66
Contents
vii
Figures
1. Desktop Board D945PSN Components ........................................................................11
2. LAN Port LED Locations...............................................................................................16
3. Location of Standby Power Indicator.............................................................................20
4. Installing the I/O Shield.................................................................................................26
5. Desktop Board D945PSN Mounting Screw Hole Locations...........................................27
6. Lift Socket Lever...........................................................................................................28
7. Lift the Load Plate and Don’t Touch the Socket Contacts .............................................28
8. Remove the Protective Socket Cover ...........................................................................29
9. Remove the Processor from the Protective Processor Cover/Do Not Touch.................29
10. Install Processor ...........................................................................................................30
11. Close the Load Plate ....................................................................................................30
12. Connecting the Processor Fan Heat Sink Cable to the Processor Fan Connector ........31
13. Dual Configuration Example 1 ......................................................................................32
14. Dual Configuration Example 2 ......................................................................................32
15. Dual Configuration Example 3 ......................................................................................33
16. Installing a DIMM..........................................................................................................34
17. Inserting a PCI Express x16 Card.................................................................................36
18. Connecting the IDE Cable ............................................................................................37
19. Connecting the Serial ATA Cable .................................................................................38
20. Internal Headers ...........................................................................................................39
21. Back Panel Audio Connectors for Flexible 6-Channel Audio System ............................42
22. Location of Fan Headers...............................................................................................43
23. Connecting Power Supply Cables.................................................................................44
24. Location of Other Connectors on Desktop Board D945PSN .........................................45
25. Location of the BIOS Configuration Jumper..................................................................46
26. Removing the Battery ...................................................................................................52
27. F2 Key ..........................................................................................................................53
Tables
1. Feature Summary...........................................................................................................9
2. Desktop Board D945PSN Components ........................................................................12
3. Power Supply Requirements.........................................................................................13
4. Desktop Board D945PSN Memory Configurations........................................................14
5. RJ-45 10/100/1000 Gigabit Ethernet LAN Connector LEDs ..........................................17
6. Front Panel Audio Header Signal Names for Intel
®
High Definition Audio .....................40
7. AC ’97 Audio Header Signal Names .............................................................................40
8. USB 2.0 Header Signal Names.....................................................................................41
9. IEEE 1394a Header Signal Names...............................................................................41
10. Front Panel Header Signal Names................................................................................41
11. Jumper Settings for the BIOS Setup Program Modes ...................................................46
12. Beep Codes..................................................................................................................57
13. BIOS Error Messages...................................................................................................57
14. Safety Regulations........................................................................................................59
15. Lead-Free Board Markings ...........................................................................................64
16. EMC Regulations..........................................................................................................65
17. Product Certification Markings ......................................................................................66
Intel Desktop Board D945PSN Product Guide
viii
9
1 Desktop Board Features
This chapter briefly describes the main features of Intel
®
Desktop Board D945PSN. Table 1
summarizes the major features of the desktop board.
Table 1. Feature Summary
Form Factors
ATX (12.00-inches by 9.60-inches)
Processor
Support for an Intel
®
processor in the LGA775 package
Main Memory
Four 240-pin, 1.8 V SDRAM Dual Inline Memory Module (DIMM) sockets
667/533/400 MHz single or dual channel DDR2 SDRAM interface
Designed to support up to 4 GB of system memory
NOTE: System resources (such as PCI and PCI Express*) require physical
memory address locations that reduce available memory addresses above 3 GB.
This may result in less than 4 GB of memory being available to the operating
system and applications. For the latest list of tested memory, refer to the Intel
World Wide Web site at: http://support.intel.com/support/motherboards/desktop/
Chipset
Intel
®
945P Express Chipset consisting of:
Intel
®
82945P Memory Controller Hub (MCH) with Direct Media Interface
Intel
®
82801GB I/O Controller Hub (ICH7)
Serial Peripheral Interface (SPI) Flash or Firmware Hub (FWH)
Audio
Intel 945P Express Chipset
Intel
®
High Definition Audio interface
SigmaTel* codec
LAN Subsystem
Intel
®
82573V or 82573L Gigabit Ethernet controller with RJ-45 connector
Expansion Capabilities
Four PCI bus add-in card connectors (SMBus routed to PCI bus 2)
One PCI Express* x16 connector
Two PCI Express x1 connector
Peripheral Interfaces
Up to eight Hi-Speed USB 2.0 ports:
Four ports routed to the back panel
Four ports routed to two USB headers
Up to three IEEE 1394a ports:
One port routed to the back panel
Two ports routed to two IEEE 1394a headers
Four Serial ATA (SATA) channels (3.0 Gb/s), via the ICH7, one device per
channel
One IDE interface with ATA-66/100 support (two devices)
One diskette drive interface
One parallel port
One serial port
PS/2* keyboard and mouse ports
continued
Intel Desktop Board D945PSN Product Guide
10
Table 1. Feature Summary (continued)
BIOS
Intel
®
Platform Innovation Framework for extensible firmware interface
4 Mbit symmetrical flash memory
Support for SMBIOS
Intel
®
Rapid BIOS Boot
Intel
®
Express BIOS Update
Power Management
Support for Advanced Configuration and Power Interface (ACPI)
Suspend to RAM (STR)
Wake on USB, PCI, PCI Express, PS/2, LAN, and front panel
Hardware Management Hardware monitor with:
Three fan sensing inputs used to monitor fan activity
Remote diode temperature sensing
Intel
®
Precision Cooling Technology fan speed control
Voltage sensing to detect out of range values
Related Links:
For more information about Desktop Board D945PSN, including the Technical Product
Specification (TPS), BIOS updates, and device drivers, go to:
http://support.intel.com/support/motherboards/desktop/
Supported Operating Systems
The desktop board supports the following operating systems:
Microsoft Windows* 2000
Microsoft Windows XP Professional
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Home
Microsoft Windows XP Media Center Edition 2005
Desktop Board Features
11
Desktop Board Components
Figure 1 shows the approximate location of the major components on Desktop Board D945PSN.
E
F
G
H
R
Intel
82945P
(MCH)
Intel
82801
(ICH7R)
R
Channel B DIMM 1
Channel A DIMM 0
Channel A DIMM 1
Channel B DIMM 0
A
BC
T
D
I
J
K
L
M
N
O
P
Q
R
S
1394a
IEEE
Line In
OM17747
Figure 1. Desktop Board D945PSN Components
Intel Desktop Board D945PSN Product Guide
12
Table 2. Desktop Board D945PSN Components
Label Description
A Auxiliary rear chassis fan header 1 (4-pin, fan speed control)
B PCI Express x1 connectors
C Front panel audio header
D PCI Express x16 connector
E 12 V processor core voltage connector (2x2)
F Rear chassis fan header 1 (3-pin, fan speed control)
G Processor socket (LGA775)
H Processor fan header (4-pin, fan speed control)
I Main power connector (2x12)
J Diskette drive connector
K IDE connector
L Front chassis fan header (3-pin, fan speed control)
M BIOS configuration jumper block
N Chassis intrusion header
O Serial ATA connectors
P Front panel header
Q Alternate power LED header
R Hi-speed USB 2.0 headers
S IEEE 1394a headers
T PCI bus add-in card connectors
Related Links:
Go to the following links for more information about:
Desktop Board D945PSN
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Supported processors
http://support.intel.com/support/motherboards/desktop
Audio software and utilities
http://www.intel.com/design/motherbd
LAN software and drivers
http://www.intel.com/design/motherbd
Desktop Board Features
13
Processor
CAUTION
Failure to use the appropriate power supply (below) and/or not connecting the 12 V (2x2) power
connector to the desktop board may result in damage to the board or the system may not function
properly.
Table 3. Power Supply Requirements
Platform Compatibility Guide Power Supply Requirements
05B 12V2 rating of 16 A continuous and 19 A peak current for 10mS
05A 12V2 rating of 13 A continuous and 16.5 A peak current for 10mS
04B or 04A ATX12V (version 2.0 or greater) compliant Power Supply
Desktop Board D945PSN supports an Intel processor in the LGA775 package. Processors are not
included with the desktop board and must be purchased separately. The processor connects to the
desktop board through the LGA775 socket.
The supported processors list for Desktop Board D945PSN is located on the web at:
http://support.intel.com/support/motherboards/desktop/
Related Links:
Go to the following links or pages for more information about:
Instructions on installing or upgrading the processor, page
28 in Chapter 2
The location of the two power connectors, page
44 in Chapter 2
Intel Desktop Board D945PSN Product Guide
14
Main Memory
NOTE
To be fully compliant with all applicable Intel
®
SDRAM memory specifications, the board should
be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your
memory modules do not support SPD, you will see a notification to this effect on the screen at
power up. The BIOS will attempt to configure the memory controller for normal operation.
The desktop board supports dual or single channel memory configurations defined in Table 4.
Table 4. Desktop Board D945PSN Memory Configurations
Memory Speed FSB frequency (MHz) Memory Speed (MHz)
1066 667
800 667
DDR2-667
533 533
1066 533
800 533
DDR2-533
533 533
800 400 DDR2-400
533 400
Four 240-pin Double Data Rate 2 (DDR2) SDRAM Dual Inline Memory Modules (DIMMs)
connectors with gold plated contacts
Unbuffered, non-registered single or double-sided DIMMs
Serial Presence Detect (SPD) memory only
Non-ECC RAM
1.8 V memory
Memory configuration listed below:
Up to 2.0 GB utilizing 256 Mb technology
Up to 4.0 GB utilizing 512 Mb or 1 Gb technology
NOTE
System resources (such as PCI and PCI Express) require physical memory address locations that
reduce available memory addresses above 3 GB. This may result in less than 4 GB of memory
being available to the operating system and applications.
Related Links:
Go to the following links or pages for more information about:
The latest list of tested memory,
http://support.intel.com/support/motherboards/desktop/
SDRAM specifications,
http://www.intel.com/technology/memory/
Installing memory, page
32 in Chapter 2
Desktop Board Features
15
Intel
®
945P Express Chipset
The Intel 945P Express Chipset consists of the following devices:
Intel 82945P Memory Controller Hub (MCH) with Digital Media Interface
Intel 82801GB I/O Controller Hub (ICH7)
Serial Peripheral Interface (SPI) Flash or Firmware Hub (FWH)
Related Link:
Go to the following link for more information about the Intel 945P Express Chipset:
http://developer.intel.com/design/nav/pcserver.htm
Graphics Subsystem
Desktop Board D945PSN includes the following:
Intel 945P Express Chipset
PCI Express x16 connector for graphics expansion
Audio Subsystem
Desktop Board D945PSN includes a flexible 6-channel audio subsystem based on an Intel
®
High
Definition Audio codec:
The audio subsystem features:
Intel 82801GB I/O Controller Hub (ICH7)
SigmaTel STAC9220 audio codec
Impedance sensing capability for jack re-tasking
S/N (signal-to-noise) ratio: 95 dB
Microphone input that supports:
Stereo microphone
Microphone boost
The subsystem includes the following connectors:
Front panel audio connector, including functionality for:
Line out
Mic in
Back panel audio connectors that are configurable through the drivers of the audio devices:
Line in
Line out
Mic in
Center/LFE out
Rear left and right out
Intel Desktop Board D945PSN Product Guide
16
Related Links:
Go to the following link or pages for more information about:
Audio drivers and utilities
http://support.intel.com/support/motherboards/desktop/
Installing the front panel audio solution, page
40 in Chapter 2
Location of the back panel audio connectors, page
42 in Chapter 2
Input/Output (I/O) Controller
The super I/O controller features the following:
Low pin count (LPC) interface
One serial port
One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
Serial IRQ interface compatible with serialized IRQ support for PCI systems
PS/2-style mouse and keyboard interfaces
Interface for one 1.2 MB or 1.44 MB diskette drive
Intelligent power management, including a programmable wake up event interface
PCI power management support
LAN Subsystem
The LAN, with the Intel 82801GB (ICH7), provides the following functions:
Support for Intel 82573V or 82573L 10/100/1000 Gigabit Ethernet LAN
Support for RJ-45 connector with status indicator LEDs
Programmable transit threshold
Configurable EEPROM that contains the MAC address
LAN Subsystem Software
For LAN software and drivers, refer to the D945PSN link on Intel’s World Wide Web site at:
http://support.intel.com/support/motherboards/desktop
RJ-45 LAN Connector LEDs
Two LEDs are built into the RJ-45 LAN port located on the back panel (see Figure 2).
OM17386
Figure 2. LAN Port LED Locations
Desktop Board Features
17
Table 5 describes the LED states when the board is powered up and the 10/100/1000 Gigabit
Ethernet LAN subsystem is operating.
Table 5. RJ-45 10/100/1000 Gigabit Ethernet LAN Connector LEDs
LED LED Color LED State Indicates
Left Off LAN link is not established
Green
On LAN link is established
Blinking LAN activity is occurring
N/A Off 10 Mb/s data rate
Green On 100 Mb/s data rate
Right
Yellow On 1000 Mb/s data rate
Hi-Speed USB 2.0 Support
NOTE
Computer systems that have an unshielded cable attached to a USB port might not meet FCC
Class B requirements, even if no device or a low-speed USB device is attached to the cable.
Use a shielded cable that meets the requirements for a full-speed USB device.
The desktop board supports up to eight USB 2.0 ports via ICH7; four ports routed to the back
panel and four routed to two internal USB 2.0 headers. USB 2.0 ports are backward compatible
with USB 1.1 devices. USB 1.1 devices will function normally at USB 1.1 speeds.
USB 2.0 support requires both an operating system and drivers that fully support USB 2.0 transfer
rates. Disabling Hi-Speed USB in the BIOS reverts all USB 2.0 ports to USB 1.1 operation. This
may be required to accommodate operating systems that do not support USB 2.0.
Enhanced IDE Interface
The ICH7’s IDE interface handles the exchange of information between the processor and
peripheral devices like hard disks, CD-ROM drives, and Iomega Zip
*
drives inside the computer.
The interface supports:
Up to two IDE devices (such as hard drives)
ATAPI-style devices (such as CD-ROM drives)
Older PIO Mode devices
Ultra DMA-33 and ATA-66/100 protocols
Laser Servo (LS-120) drives
Serial ATA
The desktop board supports four Serial ATA channels (3.0 Gb/s) via ICH7, connecting one device
per channel.
Intel Desktop Board D945PSN Product Guide
18
Expandability
The desktop board supports the following:
One PCI Express x16 add-in card
Two PCI Express x1 add-in card
Four PCI add-in cards
Related Links:
For information about installing the PCI Express x16 card, see page
36 in Chapter 2.
BIOS
The BIOS provides the Power-On Self-Test (POST), the BIOS Setup program, the PCI/PCI
Express and IDE auto-configuration utilities, and the video BIOS. The BIOS is stored in the Serial
Peripheral Interface (SPI) Flash or Firmware Hub.
The BIOS can be entered by pressing the <F2> key at startup. The BIOS can be updated by
following the instructions on page
53 in Chapter 3.
Serial ATA and IDE Auto Configuration
If you install a Serial ATA or IDE device (such as a hard drive) in your computer, the auto-
configuration utility in the BIOS automatically detects and configures the device for your computer.
You do not need to run the BIOS Setup program after installing a Serial ATA or IDE device. You
can override the auto-configuration options by specifying manual configuration in the BIOS Setup
program.
PCI and PCI Express Auto Configuration
If you install a PCI/PCI Express add-in card in your computer, the PCI/PCI Express auto-
configuration utility in the BIOS automatically detects and configures the resources (IRQs, DMA
channels, and I/O space) for that add-in card. You do not need to run the BIOS Setup program after
you install a PCI/PCI Express add-in card.
Security Passwords
The BIOS includes security features that restrict whether the BIOS Setup program can be accessed
and who can boot the computer. A supervisor password and a user password can be set for the
BIOS Setup and for booting the computer, with the following restrictions:
The supervisor password gives unrestricted access to view and change all Setup options. If
only the supervisor password is set, pressing <Enter> at the password prompt of Setup gives the
user restricted access to Setup.
If both the supervisor and user passwords are set, you must enter either the supervisor password
or the user password to access Setup. Setup options are then available for viewing and
changing depending on whether the supervisor or user password was entered.
Setting a user password restricts who can boot the computer. The password prompt is
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, you can enter either password
to boot the computer.
Desktop Board Features
19
Related Links:
For instructions on resetting the password, see
Clearing Passwords on page 47.
Chassis Intrusion
The board supports a chassis security feature that detects if the chassis cover has been removed.
The security feature uses a mechanical switch on the chassis that can be connected to the chassis
intrusion header on the desktop board. See
Figure 20 on page 39 for the location of the chassis
intrusion header.
Power Management Features
Power management is implemented at several levels, including:
Advanced Configuration and Power Interface (ACPI)
Hardware support:
Power connectors
Fan connectors
Suspend to RAM (Instantly Available PC technology)
Wake from USB
Wake from PS/2 keyboard/mouse
PME# wakeup support
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with the desktop board requires an operating system that
provides full ACPI support.
Power Connectors
The desktop board has three power connectors. See Figure 23 on page 44 for the location of the
power connectors.
Fan Connectors
The desktop board has a 4-pin processor fan header and two 3-pin chassis fan headers. See
Figure 22 on page 43 for the location of the fan headers.
Fan Speed Control (Intel
®
Precision Cooling Technology)
Intel Precision Cooling Technology automatically adjusts the processor fan speed based on the
processor thermal diode temperature and adjusts the chassis fan speeds depending on the system
temperature. System fan noise may be reduced by operating controlled chassis and processor fans
at the minimum necessary speeds.
The processor and chassis fan speed control features can be disabled independently through the
desktop board BIOS. Disabling the processor fan speed control will result in the fan operating at
full speed if it is not a self controlled fan. It is recommended that processor fan speed control
remain enabled (default BIOS setting) when using the processor fan heat-sink included with Intel
®
boxed processors. Disabling the chassis fan speed control results in chassis fans always operating
Intel Desktop Board D945PSN Product Guide
20
at full speed. The chassis fan speed control feature should be disabled if a self-controlled chassis
fan is attached to any controlled chassis fan header.
The overall system noise reduction will vary based on system configuration and environment.
Suspend to RAM (Instantly Available PC Technology)
CAUTIONS
For Instantly Available PC technology, the 5 V standby line for the power supply must be capable
of delivering adequate +5 V standby current. Failure to provide adequate standby current when
using this feature can damage the power supply and/or affect ACPI S3 sleep state functionality.
Power supplies used with this desktop board must be able to provide enough standby current to
support the standard Instantly Available (ACPI S3 sleep state) configuration. If the standby
current necessary to support multiple wake events from the PCI and/or USB buses exceeds power
supply capacity, the desktop board may lose register settings stored in memory.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM) sleep
state. While in the S3 sleep state, the computer will appear to be off. When signaled by a wake-up
device or event, the system quickly returns to its last known awake state.
The desktop board’s standby power indicator, shown in
Figure 3, is lit when there is standby power
to the system. This includes the memory modules and PCI bus connectors, even when the
computer appears to be off.
If the system has a dual-colored power LED on the front panel, the sleep state is indicated by the
LED turning amber.
OM17748
Figure 3. Location of Standby Power Indicator
Related Links:
For more information on standby current requirements for the desktop board, refer to the Technical
Product Specification by going to the following link, finding the product, and selecting Product
Documentation from the left-hand menu:
http://support.intel.com/support/motherboards/desktop/
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